Air quality index [µg/m3]:
excellent ≤ 20
good ≤ 60
lightly polluted ≤ 100
moderately polluted ≤ 140
heavily polluted ≤ 200
severely polluted > 200
PM 2.5
[µg/m3]
PM 10
HOUR OPOLSKA ST. ROOF (BEFORE FILTERS)  AIR SUPPLIED TO OFFICES
220034goodexcellent61excellent
210032goodexcellent51excellent
200033goodexcellent51excellent
190026goodexcellent41excellent
180022goodexcellent31excellent
170015excellentexcellent31excellent
160015excellentexcellent31excellent
150016excellentexcellent31excellent
140017excellentexcellent31excellent
130017excellentexcellent31excellent
120018excellentexcellent31excellent
110019excellentexcellent41excellent
100020excellentexcellent51excellent
090028goodexcellent51excellent
080044goodexcellent61excellent
070039goodexcellent61excellent
060032goodexcellent41excellent
050026goodexcellent31excellent
040025goodexcellent31excellent
030023goodexcellent41excellent
020027goodexcellent41excellent
010028goodexcellent51excellent
000030goodexcellent41excellent
230027goodexcellent51excellent